US4874586A - Raghouse bag design for simultaneous particulate capture and chemical reaction - Google Patents

Raghouse bag design for simultaneous particulate capture and chemical reaction Download PDF

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Publication number
US4874586A
US4874586A US07/128,558 US12855887A US4874586A US 4874586 A US4874586 A US 4874586A US 12855887 A US12855887 A US 12855887A US 4874586 A US4874586 A US 4874586A
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US
United States
Prior art keywords
bag
wall
gas stream
chemical
tubular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/128,558
Inventor
Thomas Szymanski
Stephen M. Turner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Abrasives Inc
Original Assignee
Norton Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Norton Co filed Critical Norton Co
Assigned to NORTON COMPANY, WORCESTER, MASSACHUSETTS, A CORP. OF MA reassignment NORTON COMPANY, WORCESTER, MASSACHUSETTS, A CORP. OF MA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SZYMANSKI, THOMAS, TURNER, STEPHEN M.
Priority to US07/128,558 priority Critical patent/US4874586A/en
Priority to AU25670/88A priority patent/AU607824B2/en
Priority to KR1019880015790A priority patent/KR970001435B1/en
Priority to CN88108177A priority patent/CN1015231B/en
Priority to BR888806251A priority patent/BR8806251A/en
Priority to EP88119910A priority patent/EP0318934B1/en
Priority to DE8888119910T priority patent/DE3873282T2/en
Priority to AT88119910T priority patent/ATE78712T1/en
Priority to CA000584715A priority patent/CA1326346C/en
Publication of US4874586A publication Critical patent/US4874586A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/10—Nitrogen; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/101—Baghouse type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/10—Catalytic reduction devices

Definitions

  • the current method of removing particulates such as fly ash as well as gaseous pollutants such as NO x employs several different processes in series. If one, for example, combines the separate processes of particulate and NO x removal into one, it obviously offers distinct advantages in terms of size, ease of retrofitting, etc.
  • Pirsch teaches in U.S. Pat. No. 4,220,633 a process for the simultaneous removal of NO x and particulate matter from a gas stream where the catalyst may be incorporated into or onto the filter fabric. This is a costly process and the necessity of frequent cleaning of filter bags and their dusty process environment can lead to catalyst being removed from the bag.
  • FIG. 1 is a side view, partly in cross-section, of a filter bag of the invention.
  • FIG. 2 is a cross-sectional view to show the construction of a baghouse employing filter bags of the present invention.
  • FIG. 3 is a view, like FIG. 1, of a modified form of the bag of the present invention.
  • FIG. 4 is a vertical sectional view of a baghouse incorporating the bag shown in FIG. 3.
  • This invention consists of two bags, one inside the other, attached to each other by any method known to those skilled in the art such as stitching, stapling, adhesives, solvent welding, snaps, zippers, etc.
  • the channels so formed can be varied in size by appropriate adjustment of the bags and seam widths.
  • After manufacture and prior to installation the bags can be filled with the catalyst specific for the reaction desired.
  • the catalyst can be in any shape such as powder, granules, extrudates, tablets, spheres, rings, discs, or other shapes known to those skilled in the art.
  • the bags of this invention are easily manufactured and filled with catalyst for the intended applications. Examples of such catalysts and applications are well known by those skilled in the art. Two typical examples would be the selective catalytic reduction of NO x using ammonia and the catalytic incineration of carbon monoxide (CO) and lower hydrocarbons.
  • the bags of this invention are not limited to these two examples and are of broad utility.
  • the bags may be constructed of woven wire, fiberglass cloth, woven or non-woven polymeric and/or ceramic fibers, or other suitable fabrics capable of withstanding the temperatures of the flue gas and processing conditions.
  • the bags of this invention allow the simultaneous removal of particulates as well as the potential to remove gaseous contaminants such as NO x .
  • This invention yields a more compact total installation as it eliminates the need for one or more pieces of process equipment.
  • FIG. 1 shows a bag 10 of the invention in a tubular form, partly in cross-section.
  • Catalyst pellets 11 are contained between outer wall 12 and inner wall 13.
  • Compartments are formed by attaching the walls together at spaced distances along its axis as shown at 14, 14', 14" and 14'", etc. If desired, longitudinal attachment or stitching may be employed to further compartmentalize the space between the walls.
  • FIG. 2 shows a conventional baghouse except for the use of the bags of this invention and illustrates how the bags of the present invention can be employed.
  • the bags 10 are enclosed in a housing 22.
  • the bags supported at their tops by mechanism 23 which is adapted to shake the bags periodically to remove the dust collected, which is removed from the bottom of hopper 24.
  • the inlet gas enters inlet pipe 25, baffle 26 diverts the inlet air into annular headers 27 to which the insides of the bags 10 are exposed.
  • the cleaned air exits the outside wall of the bags and then exits the outlet pipe 28.
  • FIG. 3 shows a slightly modified type of bag 30 designed for use in a baghouse where the flow through the bag is outside-in, as illustrated in FIG. 4.
  • the outer wall 31 of bag 30 is of fine mesh, suitable for the filtration application while the inner wall 32 is relatively stiff and has meshes coarse enough to retain the catalyst, and stiff enough to maintain the geometry of the bag against gas pressure from the outside.
  • the compartments for the catalyst may be formed by, for example, wrapping and tying a cord 33 around the outside of the bag as each section of the bag is filled with particulate catalyst before installation in the baghouse.
  • FIG. 4 shows a baghouse or bag filter assembly suitable for the bags 30 of FIG. 3.
  • the gas enters inlet 41, goes through first the outer wall of bags 30 and exits the header 42 at the top of the assembly to which open ends of the bags communicate. The bottom ends of the bags are obviously closed.
  • the dust may be periodically removed from the bags by pulsing compressed air through valves 43 and nozzles 44. The dust is collected in hopper 44 and can be removed by operation of valve 45.

Abstract

Bag for receiving a gas stream containing solid particulate and undesirable gaseous components, consisting of inner and outer tubular porous walls arranged coextensively to define a space between them, which space is divided at discrete intervals into compartments containing solid particles of chemical to treat the gaseous components.

Description

BACKGROUND OF THE INVENTION
Many industrial processes produce flue gas streams which require particulate removal and/or catalytic tailgas clean-up prior to releasing them to the atmosphere. A typical example would be a coal fired power plant in which the fly ash must be removed prior to the exhaust gas leaving the smoke stack. The increased public awareness of the "acid rain" problem has increased the desire to reduce acid rain forming flue gas components such as sulfur oxides (SOx) and nitrogen oxides (NOx) from the exhaust gas as well as the fly ash. In fact, several European countries have instituted mandatory SOx and NOx controls.
The current method of removing particulates such as fly ash as well as gaseous pollutants such as NOx employs several different processes in series. If one, for example, combines the separate processes of particulate and NOx removal into one, it obviously offers distinct advantages in terms of size, ease of retrofitting, etc.
We have discovered an improved bag design for use in a hot baghouse. This discovery, for example, allows the simultaneous removal of particulates such as fly ash and, with the addition of ammonia and a selective catalytic reduction (SCR) catalyst, NOx.
Pirsch teaches in U.S. Pat. No. 4,220,633 a process for the simultaneous removal of NOx and particulate matter from a gas stream where the catalyst may be incorporated into or onto the filter fabric. This is a costly process and the necessity of frequent cleaning of filter bags and their dusty process environment can lead to catalyst being removed from the bag.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings,
FIG. 1 is a side view, partly in cross-section, of a filter bag of the invention.
FIG. 2 is a cross-sectional view to show the construction of a baghouse employing filter bags of the present invention.
FIG. 3 is a view, like FIG. 1, of a modified form of the bag of the present invention.
FIG. 4 is a vertical sectional view of a baghouse incorporating the bag shown in FIG. 3.
DESCRIPTION OF THE INVENTION
Our discovery involves a novel and inexpensive catalytic filter bag. This invention consists of two bags, one inside the other, attached to each other by any method known to those skilled in the art such as stitching, stapling, adhesives, solvent welding, snaps, zippers, etc. The channels so formed can be varied in size by appropriate adjustment of the bags and seam widths. After manufacture and prior to installation the bags can be filled with the catalyst specific for the reaction desired. The catalyst can be in any shape such as powder, granules, extrudates, tablets, spheres, rings, discs, or other shapes known to those skilled in the art.
The bags of this invention are easily manufactured and filled with catalyst for the intended applications. Examples of such catalysts and applications are well known by those skilled in the art. Two typical examples would be the selective catalytic reduction of NOx using ammonia and the catalytic incineration of carbon monoxide (CO) and lower hydrocarbons. The bags of this invention are not limited to these two examples and are of broad utility.
The bags may be constructed of woven wire, fiberglass cloth, woven or non-woven polymeric and/or ceramic fibers, or other suitable fabrics capable of withstanding the temperatures of the flue gas and processing conditions. Thus, the bags of this invention allow the simultaneous removal of particulates as well as the potential to remove gaseous contaminants such as NOx. This invention yields a more compact total installation as it eliminates the need for one or more pieces of process equipment.
FIG. 1 shows a bag 10 of the invention in a tubular form, partly in cross-section. Catalyst pellets 11 are contained between outer wall 12 and inner wall 13. Compartments are formed by attaching the walls together at spaced distances along its axis as shown at 14, 14', 14" and 14'", etc. If desired, longitudinal attachment or stitching may be employed to further compartmentalize the space between the walls.
FIG. 2 shows a conventional baghouse except for the use of the bags of this invention and illustrates how the bags of the present invention can be employed. The bags 10 are enclosed in a housing 22. The bags supported at their tops by mechanism 23 which is adapted to shake the bags periodically to remove the dust collected, which is removed from the bottom of hopper 24. The inlet gas enters inlet pipe 25, baffle 26 diverts the inlet air into annular headers 27 to which the insides of the bags 10 are exposed. The cleaned air exits the outside wall of the bags and then exits the outlet pipe 28.
FIG. 3 shows a slightly modified type of bag 30 designed for use in a baghouse where the flow through the bag is outside-in, as illustrated in FIG. 4. The outer wall 31 of bag 30 is of fine mesh, suitable for the filtration application while the inner wall 32 is relatively stiff and has meshes coarse enough to retain the catalyst, and stiff enough to maintain the geometry of the bag against gas pressure from the outside. In addition, the compartments for the catalyst may be formed by, for example, wrapping and tying a cord 33 around the outside of the bag as each section of the bag is filled with particulate catalyst before installation in the baghouse.
FIG. 4 shows a baghouse or bag filter assembly suitable for the bags 30 of FIG. 3. The gas enters inlet 41, goes through first the outer wall of bags 30 and exits the header 42 at the top of the assembly to which open ends of the bags communicate. The bottom ends of the bags are obviously closed. The dust may be periodically removed from the bags by pulsing compressed air through valves 43 and nozzles 44. The dust is collected in hopper 44 and can be removed by operation of valve 45.

Claims (3)

What is claimed is:
1. Bag for use in removing particulate from a gas stream and simultaneously treating undesirable gaseous components of the gas stream, comprising:
(a) a first tubular porous wall,
(b) a second tubular porous wall mounted in telescoping, coextensive relationship inwardly of the first tubular wall to define a space between the two walls,
(c) means located at substantial longitudinal intervals between the tubular walls to divide the space into a plurality of discrete compartments,
(d) solid particles of chemical contained in each of the compartments, the chemical particles acting to treat an undesirable gaseous component,
wherein passage of a gas stream laterally through the tubular walls and space therebetween initially encounters the first wall and deposits particulate thereon, the gas stream subsequently passing through the particles of chemical and the second wall.
2. Bag as recited in claim 1, wherein the first wall is provided with fine pores of a dimension that will not pass the solid particles of chemical particulate, but will pass the gas stream.
3. Bag as recited in claim 1, wherein one of the walls is formed of a relatively stiff fabric which lends physical strength to the bag, while the other wall is made of a material which is relatively flexible to facilitate the formation of the compartments.
US07/128,558 1987-12-03 1987-12-03 Raghouse bag design for simultaneous particulate capture and chemical reaction Expired - Lifetime US4874586A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US07/128,558 US4874586A (en) 1987-12-03 1987-12-03 Raghouse bag design for simultaneous particulate capture and chemical reaction
AU25670/88A AU607824B2 (en) 1987-12-03 1988-11-17 Bag for removal of solid material from gases and for treatment of said gases
BR888806251A BR8806251A (en) 1987-12-03 1988-11-28 BAG FOR REMOVING SOLID MATERIAL IN PARTICLES FROM A GAS CHAIN AND SIMULTANEOUS TREATMENT OF THE GAS CHAIN AND BAG BOX
CN88108177A CN1015231B (en) 1987-12-03 1988-11-28 Bag for removal of solid material from gases and for treatment of said gases
KR1019880015790A KR970001435B1 (en) 1987-12-03 1988-11-28 Bag for removal of solid material from gases and for treatment of the said gases
EP88119910A EP0318934B1 (en) 1987-12-03 1988-11-29 Bag for removal of solid material from gases and for treatment of said gases
DE8888119910T DE3873282T2 (en) 1987-12-03 1988-11-29 FILTER BAG FOR REMOVING SOLIDS FROM GASES AND TREATING THESE GASES.
AT88119910T ATE78712T1 (en) 1987-12-03 1988-11-29 FILTER BAG FOR REMOVING SOLIDS FROM GASES AND TREATMENT OF THESE GASES.
CA000584715A CA1326346C (en) 1987-12-03 1988-12-01 Baghouse bag design for simultaneous particulate capture and chemical reaction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/128,558 US4874586A (en) 1987-12-03 1987-12-03 Raghouse bag design for simultaneous particulate capture and chemical reaction

Publications (1)

Publication Number Publication Date
US4874586A true US4874586A (en) 1989-10-17

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Application Number Title Priority Date Filing Date
US07/128,558 Expired - Lifetime US4874586A (en) 1987-12-03 1987-12-03 Raghouse bag design for simultaneous particulate capture and chemical reaction

Country Status (9)

Country Link
US (1) US4874586A (en)
EP (1) EP0318934B1 (en)
KR (1) KR970001435B1 (en)
CN (1) CN1015231B (en)
AT (1) ATE78712T1 (en)
AU (1) AU607824B2 (en)
BR (1) BR8806251A (en)
CA (1) CA1326346C (en)
DE (1) DE3873282T2 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014155A1 (en) * 1989-05-18 1990-11-29 Olin Corporation Salt handling apparatus for a hypochlorous acid reactor
US5116594A (en) * 1989-05-18 1992-05-26 Olin Corporation Salt handling apparatus for a hypochlorous acid reactor
US5387406A (en) * 1990-09-17 1995-02-07 Walther & Cie Ag Method and device for the adsorption and chemisorption, respectively, of gaseous components in a gas stream
US5540897A (en) * 1988-07-25 1996-07-30 The Babcock & Wilcox Company Improved SOx, NOx, and particulate removal system
US5549826A (en) * 1994-06-10 1996-08-27 Lapoint, Jr.; John H. Filtration bag
US6497156B2 (en) 1999-12-28 2002-12-24 Horiba Instruments, Inc. Method for collecting exhaust gases
US6576033B1 (en) 1998-11-30 2003-06-10 Pall Corporation Filter for use in medical procedures
US6932857B1 (en) 2001-09-10 2005-08-23 Henry Krigmont Multi-stage collector and method of operation
US20080092736A1 (en) * 2006-10-24 2008-04-24 Henry Krigmont Multi-stage collector for multi-pollutant control
US20090151567A1 (en) * 2007-12-17 2009-06-18 Henry Krigmont Space efficient hybrid air purifier
US20090151568A1 (en) * 2007-12-17 2009-06-18 Krigmont Henry V Space efficient hybrid collector
US7597750B1 (en) 2008-05-12 2009-10-06 Henry Krigmont Hybrid wet electrostatic collector
US20100095843A1 (en) * 2008-10-22 2010-04-22 Gebert Richard E Air Pollution Control Filter Elements for Filtration Systems
US20110258976A1 (en) * 2008-10-08 2011-10-27 KAPPA Filter Systems GmbH Filter element for cleaning an air stream that is charged with particles and filter device that is equipped with said element
RU2701540C2 (en) * 2015-07-08 2019-09-27 Лаб Са Flue gas cleaning device comprising bag filter and catalyst
WO2020193979A1 (en) * 2019-03-27 2020-10-01 Johnson Matthey Public Limited Company Catalysed filter system for treating particulate-containing exhaust gas from stationary emission sources

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JPH08117559A (en) * 1994-10-25 1996-05-14 Mitsubishi Heavy Ind Ltd Denitration apparatus of coal burning boiler
EP0956138A1 (en) * 1996-09-30 1999-11-17 Jorgen Hojmark Jensen Air cleaning element of the filter cartridge type
EP1042048A1 (en) * 1997-12-15 2000-10-11 Nordifa-Gruppen AB Air cleaning element of the cartridge tube type
US6749670B2 (en) 2001-03-26 2004-06-15 Shell Oil Company Process for trapping particulate matter in hot gas and trap therefor
KR100988891B1 (en) * 2008-09-10 2010-10-20 한국에너지기술연구원 Combination type gas filter
CN102600684A (en) * 2012-03-15 2012-07-25 温州菲德石化科技有限公司 Embedded type automatic blowback filter at top of catalyst tank
ITMI20120408A1 (en) * 2012-03-16 2013-09-17 Ricerca Sul Sist Energetico Rs E S P A PROCEDURE FOR COMBINED AND SIMULTANEOUS FILLING FROM COMBUSTION FUMES OF VOLATILE ORGANIC COMPOUNDS, OXIDES OF NITROGEN AND PARTICULATE OF COMBUSTION, AND PLANT TO REALIZE THIS PROCEDURE
WO2016207873A1 (en) * 2015-06-25 2016-12-29 Woods Michael John A device for filtering particulates
DE102016000027A1 (en) * 2016-01-04 2017-07-06 Fachhochschule Kiel A filter assembly
EP3705166A1 (en) * 2019-03-08 2020-09-09 Carl Freudenberg KG Filter tube in torus design
CN110496510B (en) * 2019-07-08 2021-09-14 人民百业科技有限公司 Odor purification device for processing liquid crystal module

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US4289855A (en) * 1977-12-30 1981-09-15 Oxoid Limited Safety catalyst systems
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US3826066A (en) * 1971-07-16 1974-07-30 Summit Filter Corp Double-wall filter bag construction
US3816977A (en) * 1971-10-04 1974-06-18 Aerodyne Dev Corp Method and apparatus for bag collection of dirt
US3853508A (en) * 1971-10-04 1974-12-10 Aerodyne Dev Corp Apparatus for bag collection of dirt
US4289855A (en) * 1977-12-30 1981-09-15 Oxoid Limited Safety catalyst systems
US4220633A (en) * 1979-04-30 1980-09-02 The Babcock & Wilcox Company Filter house and method for simultaneously removing NOx and particulate matter from a gas stream
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US4728503A (en) * 1984-11-02 1988-03-01 Mitsubishi Jukogyo Kabushiki Kaisha Filter medium for treating an exhaust gas

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5585081A (en) * 1988-07-25 1996-12-17 The Babcock & Wilcox Company SOx, NOx and particulate removal system
US5540897A (en) * 1988-07-25 1996-07-30 The Babcock & Wilcox Company Improved SOx, NOx, and particulate removal system
US5567394A (en) * 1988-07-25 1996-10-22 The Babcock & Wilcox Company SOx , NOx , and particulate removal system
US5116594A (en) * 1989-05-18 1992-05-26 Olin Corporation Salt handling apparatus for a hypochlorous acid reactor
WO1990014155A1 (en) * 1989-05-18 1990-11-29 Olin Corporation Salt handling apparatus for a hypochlorous acid reactor
US5387406A (en) * 1990-09-17 1995-02-07 Walther & Cie Ag Method and device for the adsorption and chemisorption, respectively, of gaseous components in a gas stream
US5549826A (en) * 1994-06-10 1996-08-27 Lapoint, Jr.; John H. Filtration bag
US6576033B1 (en) 1998-11-30 2003-06-10 Pall Corporation Filter for use in medical procedures
US6746504B2 (en) 1998-11-30 2004-06-08 Pall Corporation Filter for use in medical procedures
US6497156B2 (en) 1999-12-28 2002-12-24 Horiba Instruments, Inc. Method for collecting exhaust gases
US6932857B1 (en) 2001-09-10 2005-08-23 Henry Krigmont Multi-stage collector and method of operation
US7559976B2 (en) 2006-10-24 2009-07-14 Henry Krigmont Multi-stage collector for multi-pollutant control
US20080092736A1 (en) * 2006-10-24 2008-04-24 Henry Krigmont Multi-stage collector for multi-pollutant control
US20090151567A1 (en) * 2007-12-17 2009-06-18 Henry Krigmont Space efficient hybrid air purifier
US20090151568A1 (en) * 2007-12-17 2009-06-18 Krigmont Henry V Space efficient hybrid collector
US7582145B2 (en) 2007-12-17 2009-09-01 Krigmont Henry V Space efficient hybrid collector
US7582144B2 (en) 2007-12-17 2009-09-01 Henry Krigmont Space efficient hybrid air purifier
US7597750B1 (en) 2008-05-12 2009-10-06 Henry Krigmont Hybrid wet electrostatic collector
US20110258976A1 (en) * 2008-10-08 2011-10-27 KAPPA Filter Systems GmbH Filter element for cleaning an air stream that is charged with particles and filter device that is equipped with said element
US9770685B2 (en) * 2008-10-08 2017-09-26 KAPPA Filter Systems GmbH Filter element for cleaning an air stream that is charged with particles and filter device that is equipped with said element
US20100095843A1 (en) * 2008-10-22 2010-04-22 Gebert Richard E Air Pollution Control Filter Elements for Filtration Systems
US8114201B2 (en) 2008-10-22 2012-02-14 Gore Enterprise Holdings, Inc. Air pollution control filter elements for filtration systems
RU2701540C2 (en) * 2015-07-08 2019-09-27 Лаб Са Flue gas cleaning device comprising bag filter and catalyst
WO2020193979A1 (en) * 2019-03-27 2020-10-01 Johnson Matthey Public Limited Company Catalysed filter system for treating particulate-containing exhaust gas from stationary emission sources
US20200306694A1 (en) * 2019-03-27 2020-10-01 Johnson Matthey Public Limited Company Catalysed filter system for treating particulate-containing exhaust gas from stationary emission sources
US11833471B2 (en) * 2019-03-27 2023-12-05 Johnson Matthey Public Limited Company Catalysed filter system for treating particulate-containing exhaust gas from stationary emission sources

Also Published As

Publication number Publication date
KR890009446A (en) 1989-08-02
AU607824B2 (en) 1991-03-14
BR8806251A (en) 1989-08-15
KR970001435B1 (en) 1997-02-06
CA1326346C (en) 1994-01-25
EP0318934A2 (en) 1989-06-07
AU2567088A (en) 1989-06-15
DE3873282D1 (en) 1992-09-03
CN1015231B (en) 1992-01-01
ATE78712T1 (en) 1992-08-15
EP0318934B1 (en) 1992-07-29
CN1034490A (en) 1989-08-09
EP0318934A3 (en) 1991-04-10
DE3873282T2 (en) 1992-12-10

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